渐近相等的

At the same time, the practical implementation of evolutionary algorithm is given in order that evolutionary algorithm is introduced into vector quantizer. In the fourth section the asymptotic theory of vector quantization is studied. Then the partial distortion theorem that when codebook size is large enough, each region of the partition makes an equal contribution to the distortion for an optimal quantizer, which is the key part of vector quantizer is obtained. Finally, the competitive learning algorithm based on the partial distortion theorem is proposed, which introduces the subdistortion of each region into the distortion measure to assure that the subdistortion of each region approximately equals to each other.

第四章详细研究矢量量化的渐近理论，然后得出了矢量量化器设计的核心部分——部分失真定理，当码本尺寸足够大且输出矢量的渐近概率密度与输入矢量的概率密度的幂成比例时，最优量化器划分的各个区域对该量化器的平均误差产生相同的影响，最后提出基于部分失真定理的竞争学习算法，它通过在误差测度中，引入与各区域相关的子误差以保证各区域的子误差近似相等，该算法实现较为简单，在一定程度上确保全局最优。

Spikelets with 1 floret (very rarely 2), rachilla disarticulating above glumes, with penicillate extension lying against the palea; glumes subequal, usually slightly longer than the floret, rarely slightly shorter, membranous, 1–3-veined, apex acute or acuminate; floret callus bearded, hairs usually 1/3 as long up to about equaling floret; lemma thinly to firmly membranous,(3–)5-veined, dorsally awned or awnless, apex erose, denticulate or 2–4-toothed; awn geniculate or straight, its position varying from near base to near apex, usually inconspicuous, up to twice length of lemma but occasionally reduced to a subapical mucro or absent; palea 2/3 as long to subequaling lemma.

小穗具1小花(极少2)，高于颖片，具具毛撮的扩展对内稃躺脱节的小穗轴；通常，近等长的颖片稍长于那些小花，很少稍短，膜质，脉，先端锐尖或渐尖；作为长的可达的通常的公然反对的小花结茧，头发1/3大约等于小花；稀疏外稃到坚定膜，(3-)5－脉，背具芒或者啮蚀状的顶，或者2-4齿状的具小齿，awnless；芒膝曲或者直，作为近相等外稃的长时期的内稃2/3。

Staminodes thin and long; basal leaf blade ovate-triangular, base attenuate; cauline leaf borne near base of stem, slightly smaller than or subequaling basal leaves; petals white

退化雄蕊薄和长；卵状三角形的基生叶，基部渐狭；忍受的茎生叶干，稍微小于或者近相等基生叶的近基部；花瓣白色 8 P。 humilis 矮小梅花草

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失